是否在vxml中嵌套'if'語句？

Question

是否允許嵌套'if'語句？ 例如：

<if cond="1 == 1"> 
    <if cond="2 == 2"> 
     One is in fact equal to one and Two is in fact equal to two 
    <else/> 
     One is in fact equal to one but Two is never not equal to two 
    </if> 
<else/> 
    One is never not equal to one 
</if> 

我知道我可以重寫這個條件與「&&」語句，但我試圖做的是凌亂保持如果elseifs，它必須是連鎖重複的邏輯。

Answer 1

是的，根據架構定義發現here。 if是一個executable.content元素，它允許包含零個或多個元素的序列。

Answer 2

添加到@約翰的答案（因爲評論有字數限制）：

這仍然是VXML 2.1以及真：https://www.w3.org/TR/voicexml21/vxml.xsd

<xsd:element name="if"> 
<xsd:sequence> 
<xsd:group ref="executable.content" minOccurs="0" maxOccurs="unbounded"/> 
<xsd:sequence minOccurs="0" maxOccurs="unbounded"> 
<xsd:element ref="elseif"/> 
<xsd:group ref="executable.content" minOccurs="0" maxOccurs="unbounded"/> 
</xsd:sequence> 
<xsd:sequence minOccurs="0" maxOccurs="1"> 
<xsd:element ref="else"/> 
<xsd:group ref="executable.content" minOccurs="0" maxOccurs="unbounded"/> 
</xsd:sequence> 
</xsd:sequence> 
<xsd:attributeGroup ref="If.attribs"/> 
</xsd:complexType> 
</xsd:element>